423367621 has 2 divisors, whose sum is σ = 423367622. Its totient is φ = 423367620.

The previous prime is 423367619. The next prime is 423367639. The reversal of 423367621 is 126763324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306425025 + 116942596 = 17505^2 + 10814^2 .

It is a cyclic number.

It is not a de Polignac number, because 423367621 - 2¹ = 423367619 is a prime.

It is a super-2 number, since 2×423367621² = 358480285022399282, which contains 22 as substring.

Together with 423367619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423367691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211683810 + 211683811.

It is an arithmetic number, because the mean of its divisors is an integer number (211683811).

Almost surely, 2^423367621 is an apocalyptic number.

It is an amenable number.

423367621 is a deficient number, since it is larger than the sum of its proper divisors (1).

423367621 is an equidigital number, since it uses as much as digits as its factorization.

423367621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 34.

The square root of 423367621 is about 20575.8990326061. The cubic root of 423367621 is about 750.8834750353.

The spelling of 423367621 in words is "four hundred twenty-three million, three hundred sixty-seven thousand, six hundred twenty-one".